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Io, Europa, Ganymede, and Callisto. Discovered by Galileo.

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How many moons does Jupiter have as of 2011?

Hi Jupiter is the 5th and the biggest planet in the solar system. The planet Jupiter has 63 moons. The 4 main known and the big moons of Jupiter are Io, Ganymede, Europa and Callisto. Ganymede is the biggest moon of Jupiter and is bigger than that of the Earth.


What is the biggest planet and has four moons?

The biggest planet is Jupiter. It has the 4, large Galilean moons but also other smaller moons.


How many moons Pluto or Jupiter have?

pluto has 4 known moons


What planet has 4 moons?

No planet has 4 moons. (planets as far as in our solar system)


Who Improved the telescope and observed Jupiter's moons?

Galileo was the first to look at the planet Jupiter through a telescope, and to observe the moons of Jupiter (the 4 largest moons are still known as the Galilean moons).


Jupiter has approximately how many moons?

Jupiter has 53 named moons and at least 26 more awaiting official naming, bringing the total to 79 known moons.


Is it true that Jupiter has 4 moons?

Jupiter does not have 4 moons. It has 64 moons confirmed.


Who found the four largest moons of Jupiter in the 1600s?

Galileo was the first to observe the 4 largest moons of Jupiter (which are still known as the Galilean moons, in his honor).


What Planet has 5 large moons and 10 small moons?

Jupiter has those, plus at least 48 more satellites.


What are 4 moons of Jupiter?

Io, Ganymede, Callisto and Europa are the 4 major moons, but there are about 60 other known smaller ones.


Which planet has 4 rigs and 8 moons?

The planet with 4 rings and 8 moons is Jupiter. It has a system of rings known as the "Rings of Jupiter" and it is also known to have at least 79 moons, with the four largest being Io, Europa, Ganymede, and Callisto.


What are the biggest moons orbiting Jupiter?

They are called the "Galilean Moons" because they were first seen/discovered by Galileo. There are 4 of them and they are named - Io, Europa, Ganymede and Callisto.